CN101371961B - Mechanism for detecting filter clogging, video display apparatus and electronic device - Google Patents
Mechanism for detecting filter clogging, video display apparatus and electronic device Download PDFInfo
- Publication number
- CN101371961B CN101371961B CN200810146326XA CN200810146326A CN101371961B CN 101371961 B CN101371961 B CN 101371961B CN 200810146326X A CN200810146326X A CN 200810146326XA CN 200810146326 A CN200810146326 A CN 200810146326A CN 101371961 B CN101371961 B CN 101371961B
- Authority
- CN
- China
- Prior art keywords
- revolution
- fan
- voltage
- characteristic
- air pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 230000033228 biological regulation Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 abstract description 23
- 239000003570 air Substances 0.000 description 114
- 239000004973 liquid crystal related substance Substances 0.000 description 18
- 230000003287 optical effect Effects 0.000 description 9
- 239000000428 dust Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 239000002516 radical scavenger Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a filter clogging detection mechanism that can accurately detect filter clogging in highlands, a projection type video display apparatus and electronic device using thereof. The filter clogging detection mechanism comprises a switching means for switching an operational mode of a cooling fan between a lower altitude mode and a higher altitude mode; a control means adapted to obtain a current voltage of the fan in operation when the switching means is in the highland mode, calculate the normal rpm for that current fan voltage in reference to a highland voltage-rpm characteristic, obtain a current fan rmp in operation and enable alarming means to issue a filter clogging alarm in the event that the current fan rpm is larger than the normal rpm value plus a predetermined value.
Description
Technical field
The present invention relates to projection-type image display device and electronic equipment that the filter eyelet stops up (filter plugging) testing agency and uses its liquid crystal projector etc.
Background technology
Be not only the projection-type image display device of liquid crystal projector etc., in various electronic equipments, all need to be used for the cooling fan (fan) of the heat generating components of cooled interior.In addition, be provided with filter at the cooling air suction inlet of being afraid of the equipment that dirt or dust are invaded.
Though dirt or dust can be gradually attached to causing on the above-mentioned filter that eyelet stops up, but stop up under the situation of detection at the eyelet that utilizes when the pressure loss becomes big rotary load to reduce and the characteristic of the fan that revolution uprises is carried out this filter, be made in the fan voltage under the clean state of not adhering to dirt or dust on the filter and the datum characteristic curve of revolution, in use when when the characteristic side-play amount of said reference surpasses threshold value, then be judged as the filter eyelet and stop up (for example, with reference to patent documentation 1).
Patent documentation 1: Japanese Patent Application Publication 2000-153121 communique
But, in the such technology of above-mentioned patent documentation 1, be arranged under the situation that makes its work on the highland,, can not precision carrying out the problem that the filter eyelet stops up detection well so exist because variation has taken place the situation of the decline said reference characteristic curve of air pressure and level land work.
Summary of the invention
The present invention makes in order to solve such problem just, even its objective is that providing a kind of also can precision carry out the mechanism for detecting filter clogging of filter eyelet obstruction detection and projection-type image display device and the electronic equipment that uses it well on the highland.
To achieve these goals, the mechanism for detecting filter clogging of first invention of the present invention, it is characterized in that possessing: switch unit will suck the mode of operation that extraneous air cools off the cooling fan of heat generating components via filter and switch to level land pattern and high ground mode; And control module, when this switch unit is the level land pattern, obtain the fan voltage in the work, the benchmark revolution of the reference voltage during based on the level land pattern-when the revolution characteristic is obtained said fans voltage, and obtain the fan revolution in the work, the fan revolution is compared with the situation bigger above the mode of defined threshold with the benchmark revolution that obtains under, the eyelet that carries out filter via notification unit stops up warning notice, on the other hand, when above-mentioned switch unit is high ground mode, obtain the fan voltage in the work, the benchmark revolution of the reference voltage during based on high ground mode-when the revolution characteristic is obtained said fans voltage, and obtain the fan revolution in the work, the fan revolution was compared with the situation bigger above the mode of defined threshold with the benchmark revolution that obtains under, the eyelet that carries out filter via notification unit stopped up warning notice.
The mechanism for detecting filter clogging of second invention, it is characterized in that, in the mechanism for detecting filter clogging of first invention, reference voltage-revolution the characteristic of the characteristic that above-mentioned control module uses storage in advance during as above-mentioned level land pattern, reference voltage-revolution characteristic when on the other hand, using the characteristic when above-mentioned switch unit switches to high ground mode, obtain as above-mentioned high ground mode.
The filter eyelet testing agency of the 3rd invention is characterized in that possessing: the air pressure detecting unit, detect via filter and suck the air pressure that the place is set that extraneous air cools off the cooling fan of heat generating components; And control module, obtain the fan voltage in the work, the benchmark revolution of the reference voltage during based on the level land pattern-when the revolution characteristic is obtained said fans voltage, and obtain the fan revolution in the work, be when stipulating that air pressure is above by the detected air pressure of above-mentioned air pressure detecting unit, the fan revolution is compared with the situation bigger above the mode of defined threshold with the benchmark revolution that obtains under, the eyelet that carries out filter via notification unit stops up warning notice, on the other hand, when passing through the detected air pressure of above-mentioned air pressure detecting unit less than regulation air pressure, the benchmark revolution of the reference voltage during based on high ground mode-when the revolution characteristic is obtained said fans voltage, and the said fans revolution was compared with the situation bigger above the mode of defined threshold with the benchmark revolution that obtains under, the eyelet that carries out filter via notification unit stopped up warning notice.
The mechanism for detecting filter clogging of the 4th invention, it is characterized in that, in the filter eyelet testing agency of the 3rd invention, the reference voltage-revolution characteristic when above-mentioned control module uses reference voltage-revolution characteristic when the characteristic of storage is as above-mentioned level land pattern in advance respectively and above-mentioned high ground mode.
The mechanism for detecting filter clogging of the 5th invention, it is characterized in that, in the filter eyelet testing agency of the 4th invention, above-mentioned control module is from by each regulation air pressure range in advance a plurality of reference voltages-revolution characteristic of storage, corresponding to reference voltage-revolution characteristic of selecting by the detected air pressure of above-mentioned air pressure detecting unit with as above-mentioned high ground mode the time.
The mechanism for detecting filter clogging of the 6th invention is characterized in that possessing: switch unit will suck the mode of operation that extraneous air cools off the cooling fan of heat generating components via filter and switch to level land pattern and high ground mode; And control module, when this switch unit is the level land pattern, obtain the fan revolution in the work, reference voltage when the benchmark revolution-voltage characteristic during based on the level land pattern is obtained the said fans revolution, and obtain the fan voltage in the work, fan voltage is compared with the less situation of the mode that surpasses defined threshold with the reference voltage that obtains under, the eyelet that carries out filter via notification unit stops up warning notice, on the other hand, when above-mentioned switch unit is high ground mode, obtain the fan revolution in the work, reference voltage when the benchmark revolution-voltage characteristic during based on high ground mode is obtained the said fans revolution, and obtain the fan voltage in the work, fan voltage was compared with the less situation of the mode that surpasses defined threshold with the reference voltage that obtains under, the eyelet that carries out filter via notification unit stopped up warning notice.
The mechanism for detecting filter clogging of the 7th invention, it is characterized in that, in the mechanism for detecting filter clogging of the 6th invention, benchmark revolution-the voltage characteristic of the characteristic that above-mentioned control module uses storage in advance during as above-mentioned level land pattern, benchmark revolution-the voltage characteristic of the characteristic that obtains when on the other hand, using above-mentioned switch unit to switch to high ground mode during as above-mentioned high ground mode.
The mechanism for detecting filter clogging of the 8th invention is characterized in that possessing: the air pressure detecting unit, detect via filter and suck the air pressure that the place is set that extraneous air cools off the cooling fan of heat generating components; And control module, obtain the fan revolution in the work, reference voltage when the benchmark revolution-voltage characteristic during based on the level land pattern is obtained the said fans revolution, and obtain the fan voltage in the work, be when stipulating that air pressure is above by the detected air pressure of above-mentioned air pressure detecting unit, fan voltage is compared with the less situation of the mode that surpasses defined threshold with the reference voltage that obtains under, the eyelet that carries out filter via notification unit stops up warning notice, on the other hand, when passing through the detected air pressure of above-mentioned air pressure detecting unit less than regulation air pressure, reference voltage when the benchmark revolution-voltage characteristic during based on high ground mode is obtained the said fans revolution, and said fans voltage was compared with the less situation of the mode that surpasses defined threshold with the reference voltage that obtains under, the eyelet that carries out filter via notification unit stopped up warning notice.
The mechanism for detecting filter clogging of the 9th invention, it is characterized in that, in the mechanism for detecting filter clogging of the 8th invention, the benchmark revolution-voltage characteristic when above-mentioned control module uses benchmark revolution-voltage characteristic when the characteristic of storage is as above-mentioned level land pattern in advance respectively and above-mentioned high ground mode.
The mechanism for detecting filter clogging of the tenth invention, it is characterized in that, in the mechanism for detecting filter clogging of the 9th invention, above-mentioned control module is from by each regulation air pressure range in advance a plurality of benchmark revolution-voltage characteristics of storage, corresponding to benchmark revolution-voltage characteristic of selecting by the detected air pressure of above-mentioned air pressure detecting unit with as above-mentioned high ground mode the time.
The projection-type image display device of the 11 invention, it is characterized in that, possess first any described mechanism for detecting filter clogging of inventing the tenth invention and stop up detection with the eyelet that carries out filter, and will modulate based on vision signal from the light of illuminator irradiation, the video light after the modulation will be amplified projection.
The electronic equipment of the 12 invention is characterized in that, possesses first any described mechanism for detecting filter clogging of inventing the tenth invention and stops up detection with the eyelet that carries out filter.
According to the mechanism for detecting filter clogging of first invention of the present invention, by possessing: switch unit switches to level land pattern and high ground mode with the mode of operation of cooling fan; And control module, when this switch unit is high ground mode, obtain the fan voltage in the work, the benchmark revolution of the reference voltage during based on high ground mode-when the revolution characteristic is obtained said fans voltage, and obtain the fan revolution in the work, the fan revolution is compared with the situation bigger above the mode of defined threshold with the benchmark revolution that obtains under, the eyelet that carries out filter via notification unit stops up warning notice, thereby, even also can precision carry out filter eyelet obstruction detection well on the highland.
Mechanism for detecting filter clogging according to second invention, because the reference voltage-revolution characteristic of the characteristic that control module uses storage in advance during as the level land pattern, on the other hand, reference voltage-revolution the characteristic of the characteristic that use obtains when switch unit switches to high ground mode during as high ground mode, carry out the filter eyelet according to reference voltage-revolution characteristic corresponding and stop up detection, so more precision carries out stopping up detection at the filter eyelet on highland well with the height (air pressure) on the highland that is provided with.
Mechanism for detecting filter clogging according to the 3rd invention, by possessing air pressure detecting unit and control module, this control module is when passing through the detected air pressure of air pressure detecting unit less than regulation air pressure, benchmark revolution when the reference voltage during based on high ground mode-revolution characteristic is obtained fan voltage in the work, and fan revolution is at work compared with the benchmark revolution that obtains with under the bigger situation of the mode that surpasses defined threshold, the eyelet that carries out filter via notification unit stops up warning notice, thereby, even also can precision carry out filter eyelet obstruction detection well on the highland.
Mechanism for detecting filter clogging according to the 4th invention, reference voltage-revolution characteristic when reference voltage-revolution characteristic when using by control module that the characteristic of storage is as the level land pattern in advance respectively and high ground mode, thus stop up and detect even the filter eyelet not too can be complicated also can precision on the highland be carried out in control well.
Mechanism for detecting filter clogging according to the 5th invention, by control module from by each the regulation air pressure range and in advance the storage a plurality of reference voltages-revolution characteristic, corresponding to utilizing the detected air pressure of air pressure detecting unit to select with the reference voltage-revolution characteristic when the high ground mode, thereby more precision is carried out filter eyelet on the highland well and is stopped up and detect.
According to the mechanism for detecting filter clogging of the 6th invention, by possessing: switch unit switches to level land pattern and high ground mode with the mode of operation of cooling fan; And control module, when this switch unit is high ground mode, obtain the fan revolution in the work, reference voltage when the benchmark revolution-voltage characteristic during based on high ground mode is obtained the said fans revolution, and obtain the fan voltage in the work, fan voltage is compared with the less situation of the mode that surpasses defined threshold with the reference voltage that obtains under, the eyelet that carries out filter via notification unit stops up warning notice, thereby, even also can precision carry out filter eyelet obstruction detection well on the highland.
Mechanism for detecting filter clogging according to the 7th invention, because the benchmark revolution-voltage characteristic of the characteristic of using storage in advance by control module during as the level land pattern, on the other hand, benchmark revolution-the voltage characteristic of the characteristic that obtains when using switch unit to switch to high ground mode during as high ground mode, stop up detection thereby carry out the filter eyelet, so more precision carries out stopping up detection at the filter eyelet on highland well based on the benchmark revolution-voltage characteristic corresponding with the height (air pressure) on the highland that is provided with.
Mechanism for detecting filter clogging according to the 8th invention, by possessing: air pressure detecting unit and control module, this control module is when passing through the detected air pressure of air pressure detecting unit less than regulation air pressure, reference voltage when the benchmark revolution-voltage characteristic during based on high ground mode is obtained fan revolution in the work, and fan voltage is at work compared with the reference voltage that obtains with under the less situation of the mode that surpasses defined threshold, the eyelet that carries out filter via notification unit stops up warning notice, thereby, even also can precision carry out filter eyelet obstruction detection well on the highland.
Mechanism for detecting filter clogging according to the 9th invention, benchmark revolution-voltage characteristic when benchmark revolution-voltage characteristic when using by control module that the characteristic of storage is as the level land pattern in advance respectively and high ground mode, thus stop up and detect even the filter eyelet not too can be complicated also can precision on the highland be carried out in control well.
Mechanism for detecting filter clogging according to the tenth invention, by control module from by each the regulation air pressure range and in advance the storage a plurality of benchmark revolution-voltage characteristics, corresponding to selecting by the detected air pressure of air pressure detecting unit with the benchmark revolution-voltage characteristic when the high ground mode, thereby more precision is carried out filter eyelet on the highland well and is stopped up and detect.
According to the projection-type image display device of the 11 invention, by adopting mechanism for detecting filter clogging as described above, thereby because in this device, have the optical system of being afraid of that dust is invaded and needed cool off most, so produce effect especially.
According to the electronic equipment of the 12 invention, by adopting mechanism for detecting filter clogging as described above, thereby even can realize on the highland that also can precision carry out the filter eyelet well stops up the electronic equipment that detects.
Description of drawings
Fig. 1 is the integrally-built stereogram of expression as the liquid crystal projector of an embodiment of the invention, is the stereoscopic figure that sees from the rear side oblique upper.
Fig. 2 removes its upper shell and controls the stereogram that substrate waits.
Fig. 3 is the stereogram that removes its optical system in the same manner.
Fig. 4 is the figure of the air suction structure of expression present embodiment, is the exploded perspective view of air entry part (a), (b) is the stereogram of seeing the relation of open-close lid and filter from dorsal part.
Fig. 5 be in the same manner air entry part want portion's sectional side elevation.
Fig. 6 is the figure of cooling fan mounting structure of expression present embodiment, (a) be expression its want the stereogram of portion, (b) be that it wants portion's sectional side elevation.
Fig. 7 is the block diagram of the mechanism for detecting filter clogging of expression present embodiment.
Fig. 8 is the figure that the example pictorialization of fan voltage-revolution characteristic is represented.
Fig. 9 is the flow chart of wanting portion according to the control work of microcomputer that the filter eyelet of expression present embodiment stop up to detect.
Figure 10 is the block diagram of the mechanism for detecting filter clogging of other embodiment of expression.
Figure 11 is the flow chart of wanting portion according to the control work of microcomputer that the filter eyelet of other embodiment of expression stop up to detect.
The specific embodiment
Below, with reference to accompanying drawing embodiments of the present invention are elaborated.
Fig. 1～Fig. 3 is the integrally-built stereogram of expression as the liquid crystal projector of an embodiment of the invention, Fig. 1 is the stereoscopic figure that sees from the rear side oblique upper, Fig. 2 removes its upper shell and controls the stereogram that substrate waits, and Fig. 3 is the stereogram that removes its optical system in the same manner.
As shown in Figure 1, the body shell 2 that forms the shell of this liquid crystal projector 1 becomes laterally long slightly box-formed shape, is provided with operation display part 3 in the upper face center portion of upper shell 2a.
In addition, the lower-left side of side forms the air entry 4 of cooling usefulness overleaf, is provided with the AV panel 5 that the input and output terminal group that is used in the various I/O cables that connect video and sound etc. etc. is exposed above it.Above-mentioned air entry 4 is that slot-shaped many passages are formed on the lid (open and close member) 6 that can open and close and form, and can load and unload filter described later by opening this open-close lid 6.
On the other hand, on right flank, be formed with the exhaust outlet 7 that comprises slot-shaped many passages from rear side from upper shell 2a to lower house 2b.
In addition, as shown in Figure 2, expose projection lens 8 in front on the side.In the inside of body shell 2 (lower house 2b), see in the deep, left side from the place ahead and to dispose illuminator assembly 9, and the optical system 10 from this illuminator assembly 9 to above-mentioned projection lens 3 is configured to roughly L word shape.
On the other hand, as shown in Figure 3, be built-in with as being used for two centrifugal fans (sirocco fan) 15,15 of cooling in the inboard of air entry 4 according to RGB (red, green, the blueness) liquid crystal panel of all kinds and the drawing fan of polarizer or polarization beam apparatus etc., cooling air from these centrifugal fans 15 is blown to the optics of liquid crystal panel and polarizer or polarization beam apparatus etc. from blow-off outlet 17 via discharging side carrier pipe (duct) 16, so that they are cooled off.
Fig. 4, Fig. 5 are the figure of air suction structure of expression embodiment, and Fig. 4 (a) is the exploded perspective view of air entry part, and Fig. 4 (b) is a stereogram of seeing the relation of open-close lid and filter from dorsal part, Fig. 5 be the air entry part want portion's sectional side elevation.
In the present embodiment, the open-close lid 6 that on the air entry 19 of the suction side of above-mentioned centrifugal fan 15 carrier pipe 18, has filter loading and unloading usefulness, in the time will shielding electromagnetic guard member 20 and be inserted between filter 21 and the open-close lid 6, owing to when filter loads and unloads, become obstruction, and keep in touch difficulty with other guard member around the air entry 19, take over filter 21 so on air entry 19, install to refill after the guard member 20.
Respectively at the open-close lid 6 that becomes outer wall with become on the guard member 20 of inwall, as shown in Figure 5, with not with the centrifugal fan 15 configuration mode point-blank of the inboard that is configured in air entry 19, the air entry 4,22 that constitutes by many passages of formation with staggering.Specifically be to form: the air entry 4 of open-close lid 6 and the air entry 22 of guard member 20 are staggered up and down, and the air entry 22 of guard member 20 is positioned at upside, and the air entry 4 of open-close lid 6 is positioned at downside.Thus, because the driving sound that will send and spill from the air entry 19 of suction side carrier pipe 18 from centrifugal fan 15, shown in the arrow of dotted line, by the non-formation partly shielding effect of the air entry of guard member 20 or open-close lid 6, so can prevent to drive air entry 4 the direct leakage to device outside of sound from open-close lid 6.
And then, between open-close lid 6 and guard member 20, the pleat type filter 21 that filter filtering material 23 fold form is formed and is configured to: the direction between the air entry 22 of its folding groove and connection air entry 4 of open-close lid 6 and guard member 20 is parallel, promptly becomes above-below direction in the present embodiment.
Have again, though in the present embodiment, the folding groove of pleat type filter 21 is towards above-below direction, but under the situation that the air entry 22 with the air entry 4 of open-close lid 6 and guard member 20 forms staggering on the left and right directions (laterally), the folding groove that need make pleat type filter 21 is also towards left and right directions.
In addition, as shown in Figure 4, on the side, two ends of the framework 24 of the pleat type filter 21 that filter filtering material (not shown) fold forms, be formed with towards open-close lid 6 directions and extend and front flexure strip 25 a little toward the outer side.On the other hand, inner surface both sides at the open-close lid 6 corresponding with above-mentioned flexure strip 25, be formed with the push projection 26 that forms outstanding state towards flexure strip 25, push projection 26 engages with the inboard of the flexure strip 25 of filter framework 24 and slips when closing open-close lid 6, via guard member 20 filter 21 elasticity are constituted by being pressed in the mode on the air entry 19.
Have, though in the present embodiment, framework 24 sides at filter 21 form flexure strip 25 as described above, form push projection 26 in open-close lid 6 sides again, and framework 24 sides at filter 21 form projection on the contrary, form elastic component in open-close lid 6 sides and also can.And then, only on the either party of the framework 24 of filter 21 and open-close lid 6, be provided with and also can with the elastic component of the opposing party's elasticity butt.Importantly as long as filter 21 is elastically pressed onto elasticity fastened component on the air entry 19 possessing at least one side of filter 21 and open-close lid 6 when closing open-close lid 6 via guard member 20.
Fig. 6 (a) is the stereogram of wanting portion of the cooling fan mounting structure of expression present embodiment, and Fig. 6 (b) is that it wants portion's sectional side elevation.
In the present embodiment, as the centrifugal fan 15 of the cooling fan of the inboard that is configured in above-mentioned air entry 19, be installed in the lower house 2b of body shell 2 as on the supporting member 27 of centrifugal fan, the installation portion 29 of carrier pipe (suction side carrier pipe) 18 as centrifugal fan cap assembly 28 with the suction inlet 15a side of centrifugal fan 15.
For above-mentioned centrifugal fan 15, at the outstanding a pair of positioning and fixing 15c of portion, the 15c that is provided with of the outer peripheral face of its casing 15b, by screw etc. be fixed on they accordingly from the centrifugal fan supporting member 27 outstanding 27c of positioning and fixing portion, the 27c that are provided with, with positioning and fixing on above-mentioned installation portion 29.
And, from the both sides of the centrifugal fan cover member 28 of the centrifugal fan supporting member 27 of below and top towards centrifugal fan 15, in blade-side, with respect to outstanding respectively symmetrically a pair of supporting projections 27a, the 28a of being provided with of the central part of centrifugal fan 15 than the close centrifugal fan 15 of the 15c of its positioning and fixing portion.In addition, the supporting projections 27a of downside and upside, 28a be configured in respectively coaxial on.In the present embodiment, with the casing 15b of centrifugal fan 15 in can access big intensity outer peripheral edges be formed with above-mentioned supporting projections 27a, 28a accordingly.
And then, on the front end face of above-mentioned each supporting projections 27a, 28a, be stained with the elastic component 30 of the ring-type that synthetic rubber etc. constitutes by binding agent etc.That is, centrifugal fan 15 be stained with the supporting projections 28a up and down of elastic component 30 on the front end face, the mode that 27a clamps is constituted by resiliency supported.
Have, in Fig. 6, though only represented to be configured in the side of two centrifugal fans 15,15 of the inboard of air entry 19, the opposing party constitutes equally again.
Fig. 7 is the block diagram of the mechanism for detecting filter clogging of expression present embodiment, and Fig. 8 is the figure that the example pictorialization of fan voltage-revolution characteristic is represented.
In the present embodiment, in custom menu, possess and the mode of operation of above-mentioned centrifugal fan (cooling fan) 15 is switched to the highland of level land pattern and high ground mode/level land work change-over switch (switch unit) 50 be used as software switch, and in aforesaid operations display part 3 etc., possess and show the warning display part (notification unit) 51 that waits the obstruction of warning display filter eyelet by the LED flicker.Have again, highland/level land work change-over switch 50 be arranged on as hardware switch in operation display part 3 grades also can, in addition, replace warning display part 51 or with it and use and carry out warning notice by buzzer or sound etc. and also can.
In addition, the microcomputer (control module) 100 of the integral body of control liquid crystal projector 1, on above-mentioned highland/when level land work change-over switch 50 is the level land pattern, control as follows: obtain the fan voltage in the work, the benchmark revolution of reference voltage-revolution characteristic (with reference to " benchmark " of Fig. 8) when obtaining said fans voltage during according to the level land pattern in the nonvolatile memory that is stored in advance in the microcomputer 100, and obtain the fan revolution in the work, the fan revolution was compared with the situation bigger above the mode of defined threshold (value after " the eyelet obstruction " of Fig. 8 deducts " benchmark ") with the benchmark revolution that obtains under, the eyelet that carries out above-mentioned filter 21 via above-mentioned warning display part 51 stopped up the warning demonstration.
On the other hand, on the highland/when level land work change-over switch 50 becomes high ground mode, when promptly being arranged on the highland (filter 21 is clean state), control as follows: the voltage-revolution characteristic that obtains the fan 15 in the work, store the nonvolatile memory that can write in the microcomputer 100 into, and obtain the fan voltage in the work, the benchmark revolution of the reference voltage during according to the above-mentioned high ground mode that obtains and store-when the revolution characteristic is obtained said fans voltage, and obtain the fan revolution in the work, compare with the benchmark revolution that obtains at the fan revolution and to become in the mode that surpasses defined threshold under the bigger situation, the eyelet that carries out filter 21 via warning display part 51 stops up warning notice.
The liquid crystal projector 1 of present embodiment constitutes in above mode, to be separated into RGB three looks via optical system 10 from the light of illuminator assembly shown in Figure 29 irradiations, and on by liquid crystal panel of all kinds, modulate based on vision signal, video light after the modulation is synthesized, project on the screen via projection lens 8 amplifications.
Constitute above-mentioned optical system 10 by the liquid crystal panel of all kinds and the optics of polarizer or polarization beam apparatus etc., as shown in Figure 3 by from the cooling air of two centrifugal fans 15,15 of the inboard that is built in air entry 4 via discharging blow-off outlet 17 winding-ups that side carrier pipe 16 forms from the downside at above-mentioned optics and cooling off.
In addition, illuminator assembly 9 is by from the discharge wind winding-up of the special-purpose centrifugal fan 14 of lamp cooling as shown in Figure 2 and cool off, and the lamp ambient air that rises of temperature is inhaled into by tube-axial fan 13 and discharge outside device from exhaust outlet 7 and to cool off.
On the other hand, in the power supply module 11, inside that temperature has risen and ambient air suck by tube-axial fan 12 and from exhaust outlet 7 to the outer discharging of device, and the air that is taken place by inside and outer surface by the attraction of this tube-axial fan 12 at power supply module 11 flow cooled off.
Fig. 9 is the flow chart of wanting portion according to the control work of microcomputer 100 that the filter eyelet of expression present embodiment stop up to detect, when the control shown in this flow chart begins, at first, check whether mode of operation is level land pattern (step S101) based on the state of highland/level land work change-over switch 50.
If mode of operation is the level land pattern, just obtain fan voltage (dutycycle (duty ratio) of the PWM control) V1 ("Yes" → step S102 of step S101) of the centrifugal fan 15 in the work, reference voltage-revolution characteristic Qd during based on the level land pattern of storing in the nonvolatile memory in microcomputer 100 in advance, the benchmark revolution Rd1 (step S103) when obtaining said fans voltage V1.
Then, obtain the fan revolution R1 (step S104) of the centrifugal fan 15 in the work, check that whether fan revolution R1 compares with benchmark revolution Rd1 with the mode that surpasses defined threshold A big (R1-Rd1〉A) (step S105).Have, the afore mentioned rules threshold value A is according to fan voltage and different values as shown in Figure 8 again, and they also are stored in the nonvolatile memory in the microcomputer 100 in advance.
Fan revolution R1 compare with benchmark revolution Rd1 not in the mode that surpasses defined threshold A bigger during, return above-mentioned steps S101 and above-mentioned repeatedly processing, but because compare with benchmark revolution Rd1 when becoming in the mode that surpasses defined threshold A greatly as fan revolution R1, become the obstruction of filter 21 eyelets, show ("Yes" → step S106 of step S105) so use warning display part 51 carries out eyelet obstruction warning by LED flicker demonstration etc.User who stops up the eyelet obstruction of warning demonstration to learn filter 21 by this eyelet etc. opens open-close lid 6 and carries out the maintenance of filter 21, thereby eliminates the eyelet obstruction of filter 21.
On the other hand, filter 21 is being arranged on the highland for the liquid crystal projector 1 of clean state, highland/level land work change-over switch 50 is set under the situation that high ground mode makes its work, and being judged as mode of operation at step S101 is not the level land pattern, is branched off into step S107.
At step S107, obtain the voltage-revolution characteristic Qn in centrifugal fan 15 work on the height (air pressure) on the highland that is provided with again, and be stored in the nonvolatile memory that can write in the microcomputer 100.
Then, with similarly above-mentioned, obtain the fan voltage V2 (step S108) of the centrifugal fan 15 in the work, reference voltage-revolution characteristic Qn based on by the high ground mode in the above-mentioned nonvolatile memory that is stored in the microcomputer 100 time, the benchmark revolution Rd2 (step S109) when obtaining said fans voltage V2.
Then, obtain the fan revolution R2 (step S110) of the centrifugal fan 15 in the work, check that whether fan revolution R2 compares with benchmark revolution Rd2 with the mode that surpasses defined threshold A big (R2-Rd2〉A) (step S111).
Fan revolution R2 compare with benchmark revolution Rd2 not in the mode that surpasses defined threshold A bigger during, return above-mentioned steps S108 and above-mentioned repeatedly processing, but because compare with benchmark revolution Rd2 when becoming in the mode that surpasses defined threshold A greatly as fan revolution R2, become the obstruction of filter 21 eyelets, show ("Yes" → step S112 of step S111) so use warning display part 51 carries out eyelet obstruction warning by LED flicker demonstration etc.User who stops up the eyelet obstruction of warning demonstration to learn filter 21 by this eyelet etc. opens open-close lid 6 and carries out the maintenance of filter 21, thereby eliminates the eyelet obstruction of filter 21.
When above-mentioned high ground mode, because as long as do not change mode of operation, promptly only otherwise change the place is set, just turn back to step S108 and above-mentioned repeatedly processing from step S113, so can not carry out step S107 " voltage in the work-revolution characteristic Qn obtains " repeatedly, if when change is provided with the place, carry out the mode of operation change, then return initial step S101 and the processing of execution from beginning at first.
As mentioned above, mechanism for detecting filter clogging according to present embodiment, for the highland that will switch to level land pattern and high low mode/level land work change-over switch 50 as the mode of operation of the centrifugal fan 15 of cooling fan, when this highland/level land work change-over switch 50 is high ground mode, obtain the fan voltage V2 in the work, the benchmark revolution Rd2 of the reference voltage during based on high ground mode-when revolution characteristic Qn obtains said fans voltage V2, and obtain the fan revolution R2 in the work, fan revolution R2 compares with the situation bigger above the mode of defined threshold A with the benchmark revolution Rd2 that obtains under, the eyelet that carries out filter 21 via warning display part 51 stops up the warning demonstration, thus, even also can precision carry out filter eyelet obstruction detection well on the highland.
And then, because the reference voltage-revolution characteristic Qd when passing through as the level land pattern uses the characteristic of storage in advance, on the other hand, reference voltage during as high ground mode-revolution characteristic Qn uses on the highland/characteristic that level land work change-over switch 50 obtains when switching to high ground mode, stop up detection thereby carry out the filter eyelet, so more precision carries out stopping up detection at the filter eyelet on highland well based on reference voltage-revolution characteristic Qn corresponding to the high ground level (air pressure) that is provided with.
In addition, by in the such projection-type image display device of the liquid crystal projector 1 of present embodiment, adopting mechanism for detecting filter clogging as described above, thereby because in this device, have the optical system of being afraid of that dust is invaded and needed to cool off most, so effective especially.
On the other hand, air suction structure according to present embodiment, because by at least one side of filter 21 and open-close lid 6, possessing: the elasticity fastened component that when closing open-close lid 6, filter 21 is elastically pressed onto air entry 19 via guard member 20, thereby air entry 19 is closely contacted with filter 21 with guard member 20, so even between air entry 19 and filter 21, dispose the performance that guard member 20 also can improve filter.
And then, by constituting above-mentioned elasticity fastened component, thereby can improve filter capability at an easy rate with simpler structure by the push projection 26 that forms at the flexure strip 25 that forms on the side, framework 24 two ends of filter 21 with on inner surface both sides towards the outstanding state of flexure strip 25 corresponding to the open-close lid 6 of this flexure strip 25.
In addition, because by forming between the open-close lid 6 and guard member 20 of air entry 4,22 with staggering, the direction that pleat type filter 21 is formed between the air entry 22 of the air entry 4 that is configured to its folding groove and connection open-close lid 6 and guard member 20 is parallel, the space that does not need to guarantee in addition air-breathing stream thereby the folding groove of pleat type filter 21 becomes air-breathing stream, so can prevent the driving sound of centrifugal fan 15 directly leaks outside device from air entry 4, and only can finish, can prevent that locking apparatus maximizes with the thickness space partly of filter 21.
And then, by the air entry 4 of open-close lid 6 and the air entry 22 of guard member 20 are staggered up and down, the air entry 4 that is positioned at upside, open-close lid 6 with the air entry 22 of guard member 20 is positioned at the mode of downside and forms, even thereby the driving sound of centrifugal fan 15 leaks a little from air entry 4, because the driving sound that leaks is towards the below, so the user's of general ground set-up mode influence is become few especially.
And, because by in the such projection-type image display device of the liquid crystal projector 1 of present embodiment, adopting air suction structure as described above, can suppress of the leakage of the driving sound of centrifugal fan 15 from air entry 4, and only can finish with the thickness space partly of filter 21, thus can appreciate video at more quiet environment, and can prevent that locking apparatus maximizes, in addition, because have the optical system of being afraid of that dust is invaded most, thus filter capability can be improved, effective especially.
In addition, though the such vibrationproof fan guard of the fan periphery of covering is arranged in the prior art, even such vibrationproof fan guard does not have the tube-axial fan of outlet to need the elastic component of special shape yet and cost is uprised at outer circumferential side.In contrast to this, cooling fan (centrifugal fan) mounting structure according to present embodiment, because the simple elastic component 30 with the front end face that sticks to supporting projections 27a, 28a can be finished, so do not need the elastic component of special shape, the vibration that can realize suppressing centrifugal fan 15 is at an easy rate propagated and is become the structure of noise to body shell 2.And then, except the fixed part 15c of centrifugal fan 15,, also can access than possess the bigger inhibition of vibration of elastic component at fixed part 15c by support the blade-side that big vibration takes place than fixed part 15c via elastic component 30.
In addition, as present embodiment, be applied to have under the situation of centrifugal fan 15 of outlet at outer circumferential side at the existing vibrationproof fan guard that will cover the fan periphery because compare with tube-axial fan need be more complicated shape, so more effective.
In addition, because each supporting projections 27a, 27a and 28a, 28a dispose symmetrically with respect to the central part of centrifugal fan 15, can access big inhibition of vibration simultaneously so can support with stable status.
And then, because the supporting projections 27a of downside and upside, 28a be configured in coaxial on, can access big inhibition of vibration simultaneously so can support with stable status from the two sides side.
In addition, by suction side carrier pipe 18 to centrifugal fan cover member 28 use centrifugal fans 15, thus cheap thereby can effectively utilize suction side carrier pipe 18 to realize.
And then, by centrifugal fan supporting member 27 being used the lower house 2b of the body shell 2 of holding centrifugal fan 15, thereby thereby can effectively utilize the lower house 2b of body shell 2 to realize cheap.
In addition, because by in the such projection-type image display device of the liquid crystal projector 1 of present embodiment, adopting cooling fan as described above (centrifugal fan) mounting structure, thereby can be cheap and prevent that the vibration of centrifugal fan 15 from propagating into body shell 2 and making noise become big with producing effect, so can under more quiet environment, appreciate video, produce effect especially.
Figure 10 is the block diagram of other embodiments of expression mechanism for detecting filter clogging.
In the present embodiment, substitute the highland/level land work change-over switch 50 of above-mentioned embodiment and possess baroceptor 52.
In addition, microcomputer (control module) 100 is controlled as follows: obtain the fan voltage in the work, the benchmark revolution of the reference voltage during based on the level land pattern in the nonvolatile memory that is stored in advance in the microcomputer 100-when the revolution characteristic is obtained said fans voltage, and obtain the fan revolution in the work, at the air pressure that detects by baroceptor 52 is when stipulating that air pressure (the border air pressure on level land and highland) is above, the fan revolution was compared with the situation bigger above the mode of defined threshold with the benchmark revolution that obtains under, the eyelet that carries out filter 21 via warning display part 51 stopped up warning.
On the other hand, when passing through baroceptor 52 detected air pressure less than regulation air pressure, control as follows: the benchmark revolution of the reference voltage during based on the high ground mode in the nonvolatile memory that is stored in advance in the microcomputer 100-when the revolution characteristic is obtained said fans voltage, and the fan revolution was compared with the situation bigger above the mode of defined threshold with the benchmark revolution that obtains under, the eyelet that carries out filter 21 via warning display part 51 stopped up the warning demonstration.
Figure 11 is the flow chart of wanting portion according to the control work of microcomputer 100 that the filter eyelet of expression present embodiment stop up to detect, when when the control shown in this flow chart begins, at first obtain fan voltage (dutycycle of the PWM control) V1 (step S201) of the centrifugal fan 15 in the work.
Then, reference voltage-revolution characteristic Qd during based on the level land pattern in the nonvolatile memory that is stored in advance in the microcomputer 100, benchmark revolution Rd1 when obtaining said fans voltage V1, and obtain the fan revolution R1 (step S202 → step S203) of the centrifugal fan 15 in the work.
Then, obtain the output pressure T1 of baroceptor 52, check that resulting air pressure T1 is whether than the border air pressure Ta little (step S204 → step S205) on level land and highland.
Under the air pressure T1 situation little, check that whether said fans revolution R1 compares with benchmark revolution Rd1 with the mode that surpasses defined threshold A big (R1-Rd1〉A) ("No" → step S206 of step S205) unlike the border air pressure Ta on level land and highland.
Fan revolution R1 compare with benchmark revolution Rd1 not in the mode that surpasses defined threshold A bigger during, return above-mentioned steps S201 and above-mentioned repeatedly processing, but because compare with benchmark revolution Rd1 when becoming in the mode that surpasses defined threshold A greatly as fan revolution R1, become the obstruction of filter 21 eyelets, show ("Yes" → step S207 of step S206) so use warning display part 51 carries out eyelet obstruction warning by LED flicker demonstration etc.User who stops up the eyelet obstruction of warning demonstration to learn filter 21 by this eyelet etc. opens open-close lid 6 and carries out the maintenance of filter 21, thereby eliminates the eyelet obstruction of filter 21.
On the other hand, when being arranged on highland on for the liquid crystal projector 1 of clean state filter 21, because diminish than the border air pressure Ta on level land and highland, so be branched off into step S208 from step S205 by above-mentioned baroceptor 52 detected air pressure T1.
At step S208, the reference voltage-revolution characteristic Qa during based on the high ground mode in the nonvolatile memory that is stored in advance in the microcomputer 100, the benchmark revolution Ra1 when obtaining said fans voltage V1.
Then, check that whether said fans revolution R1 compares with benchmark revolution Ra1 with the mode that surpasses defined threshold A big (R1-Ra1〉A) (step S209).
Fan revolution R1 compare with benchmark revolution Ra1 not in the mode that surpasses defined threshold A bigger during, return above-mentioned steps S201 and above-mentioned repeatedly processing, but because compare with benchmark revolution Ra1 when becoming in the mode that surpasses defined threshold A greatly as fan revolution R1, become the obstruction of filter 21 eyelets, show ("Yes" → step S207 of step S209) so use warning display part 51 carries out eyelet obstruction warning by LED flicker demonstration etc.User who stops up the eyelet obstruction of warning demonstration to learn filter 21 by this eyelet etc. opens open-close lid 6 and carries out the maintenance of filter 21, thereby eliminates the eyelet obstruction of filter 21.
Have again, though in above-mentioned, reference voltage-revolution characteristic Qa during high ground mode only stores a kind of in advance, but also can be for example as the characteristic of 1000m～2000m, the characteristic of 2000m～3000m, reference voltage-revolution characteristic and storage in advance when preparing multiple high ground mode by each regulation air pressure range, corresponding to by baroceptor 52 detected air pressure, from a plurality of reference voltages-revolution characteristic of storage in advance, select to use.
As top, mechanism for detecting filter clogging according to present embodiment, when passing through baroceptor 52 detected air pressure T1 less than regulation air pressure Ta, benchmark revolution Ra1 when the reference voltage-revolution characteristic Qa by based on high ground mode the time obtains fan voltage V1 in the work, and fan revolution R1 at work compares with resulting benchmark revolution Ra1 with under the bigger situation of the mode that surpasses defined threshold A, stop up warning via the eyelet of warning display part 51 to carry out filter and show, thereby even also can precision carry out filter eyelet obstruction detection well on the highland.
In addition, reference voltage-revolution characteristic Qa when reference voltage-revolution characteristic Qd the when characteristic of storage is as the level land pattern in advance respectively by use and high ground mode, it is complicated that thereby control not too can become, even also can precision carry out filter eyelet obstruction detection well on the highland.
And then, reference voltage during as high ground mode-revolution characteristic Qa, as long as select to use corresponding to baroceptor 52 detected air pressure from a plurality of reference voltages-revolution characteristic of storing in advance by each regulation air pressure range, just more precision carries out stopping up detection at the filter eyelet on highland well.
Have again, though the filter eyelet in the respective embodiments described above stops up in the detection, represented according to the control example of fan voltage as the reference voltage-revolution characteristic of benchmark, still opposite, also can be based on controlling as the benchmark revolution-voltage characteristic of benchmark with the fan revolution.In this case, because " voltage " of above-mentioned embodiment and " revolution " becomes on the contrary, and decline or eyelet by air pressure stop up, though for identical fan voltage, it is big that the fan revolution becomes, but for identical fan revolution, fan voltage diminishes, and gets final product so the eyelet that carries out filter under with the less situation of the mode that surpasses defined threshold in fan voltage stops up warning notice.
In addition, in the above-described embodiment, represented optical modulation element is used the liquid crystal projector of liquid crystal panel as projection-type image display device, but in other the projection-type image display device that possesses video photogenerated system, also can use the present invention.That is, at DLP (Digital LightProcessing (digital light processing); The registration mark of company of Texas Instrument (TI)) also can use the present invention in the projector of mode etc.In addition, except the front porjection type, also can use the present invention in the projection-type image display device overleaf.
In addition, be not only projection-type image display device, in general electronic equipment, by adopting mechanism for detecting filter clogging as described above, air suction structure and cooling fan mounting structure, even thereby also can precision carry out filter eyelet obstruction detection well on the highland, in addition, the driving sound that can suppress cooling fan leaks from air entry, and because as long as so the maximization of the equipment that can prevent just can be finished in the space of the thickness of filter part, in addition, can improve filter capability, and then can be cheap and prevent that effectively the vibration of cooling fan from propagating into equipment body and making noise become big.
Claims (12)
1. mechanism for detecting filter clogging is characterized in that possessing:
Switch unit will suck the mode of operation that extraneous air cools off the cooling fan of heat generating components via filter and switch to level land pattern and high ground mode; And
Control module, when this switch unit is the level land pattern, obtain the fan voltage in the work, the benchmark revolution of the reference voltage during based on the level land pattern-when the revolution characteristic is obtained said fans voltage, and obtain the fan revolution in the work, big and surpass under the situation of defined threshold at benchmark revolution that the fan ratio of revolutions obtains, the eyelet that carries out filter via notification unit stops up warning notice, on the other hand, when above-mentioned switch unit is high ground mode, obtain the fan voltage in the work, the benchmark revolution of the reference voltage during based on high ground mode-when the revolution characteristic is obtained said fans voltage, and obtain the fan revolution in the work, big and surpass under the situation of defined threshold at benchmark revolution that the fan ratio of revolutions obtains, the eyelet that carries out filter via notification unit stops up warning notice.
2. mechanism for detecting filter clogging according to claim 1, it is characterized in that, reference voltage-revolution the characteristic of the characteristic that above-mentioned control module uses storage in advance during as above-mentioned level land pattern, reference voltage-revolution characteristic when on the other hand, using the characteristic when above-mentioned switch unit switches to high ground mode, obtain as above-mentioned high ground mode.
3. mechanism for detecting filter clogging is characterized in that possessing:
The air pressure detecting unit detects via filter and sucks the air pressure that the place is set that extraneous air cools off the cooling fan of heat generating components; And
Control module, obtain the fan voltage in the work, the benchmark revolution of the reference voltage during based on the level land pattern-when the revolution characteristic is obtained said fans voltage, and obtain the fan revolution in the work, be when stipulating that air pressure is above by the detected air pressure of above-mentioned air pressure detecting unit, big and surpass under the situation of defined threshold at benchmark revolution that the fan ratio of revolutions obtains, the eyelet that carries out filter via notification unit stops up warning notice, on the other hand, when passing through the detected air pressure of above-mentioned air pressure detecting unit less than regulation air pressure, the benchmark revolution of the reference voltage during based on high ground mode-when the revolution characteristic is obtained said fans voltage, and big and surpass under the situation of defined threshold at benchmark revolution that the said fans ratio of revolutions obtains, the eyelet that carries out filter via notification unit stops up warning notice.
4. mechanism for detecting filter clogging according to claim 3, it is characterized in that the reference voltage-revolution characteristic when above-mentioned control module uses reference voltage-revolution characteristic when the characteristic of storage is as above-mentioned level land pattern in advance respectively and above-mentioned high ground mode.
5. mechanism for detecting filter clogging according to claim 4, it is characterized in that, above-mentioned control module is from by each regulation air pressure range in advance a plurality of reference voltages-revolution characteristic of storage, corresponding to reference voltage-revolution characteristic of selecting by the detected air pressure of above-mentioned air pressure detecting unit with as above-mentioned high ground mode the time.
6. mechanism for detecting filter clogging is characterized in that possessing:
Switch unit will suck the mode of operation that extraneous air cools off the cooling fan of heat generating components via filter and switch to level land pattern and high ground mode; And
Control module, when this switch unit is the level land pattern, obtain the fan revolution in the work, reference voltage when the benchmark revolution-voltage characteristic during based on the level land pattern is obtained the said fans revolution, and obtain the fan voltage in the work, littler and surpass under the situation of defined threshold in fan voltage than the reference voltage that obtains, the eyelet that carries out filter via notification unit stops up warning notice, on the other hand, when above-mentioned switch unit is high ground mode, obtain the fan revolution in the work, reference voltage when the benchmark revolution-voltage characteristic during based on high ground mode is obtained the said fans revolution, and obtain the fan voltage in the work, littler and surpass under the situation of defined threshold than the reference voltage that obtains in fan voltage, the eyelet that carries out filter via notification unit stops up warning notice.
7. mechanism for detecting filter clogging according to claim 6, it is characterized in that, benchmark revolution-the voltage characteristic of the characteristic that above-mentioned control module uses storage in advance during as above-mentioned level land pattern, benchmark revolution-the voltage characteristic of the characteristic that obtains when on the other hand, using above-mentioned switch unit to switch to high ground mode during as above-mentioned high ground mode.
8. mechanism for detecting filter clogging is characterized in that possessing:
The air pressure detecting unit detects via filter and sucks the air pressure that the place is set that extraneous air cools off the cooling fan of heat generating components; And
Control module, obtain the fan revolution in the work, reference voltage when the benchmark revolution-voltage characteristic during based on the level land pattern is obtained the said fans revolution, and obtain the fan voltage in the work, be when stipulating that air pressure is above by the detected air pressure of above-mentioned air pressure detecting unit, littler and surpass under the situation of defined threshold in fan voltage than the reference voltage that obtains, the eyelet that carries out filter via notification unit stops up warning notice, on the other hand, when passing through the detected air pressure of above-mentioned air pressure detecting unit less than regulation air pressure, reference voltage when the benchmark revolution-voltage characteristic during based on high ground mode is obtained the said fans revolution, and little and surpass under the situation of defined threshold at reference voltage that the said fans voltage ratio obtains, the eyelet that carries out filter via notification unit stops up warning notice.
9. mechanism for detecting filter clogging according to claim 8, it is characterized in that the benchmark revolution-voltage characteristic when above-mentioned control module uses benchmark revolution-voltage characteristic when the characteristic of storage is as above-mentioned level land pattern in advance respectively and above-mentioned high ground mode.
10. mechanism for detecting filter clogging according to claim 9, it is characterized in that, above-mentioned control module is from by each regulation air pressure range in advance a plurality of benchmark revolution-voltage characteristics of storage, corresponding to benchmark revolution-voltage characteristic of selecting by the detected air pressure of above-mentioned air pressure detecting unit with as above-mentioned high ground mode the time.
11. projection-type image display device, it is characterized in that, each the described mechanism for detecting filter clogging that possesses claim 1 to 10 stops up with the eyelet that carries out filter and detects, and will modulate based on vision signal from the light of illuminator irradiation, the video light after the modulation will be amplified projection.
12. an electronic equipment is characterized in that, each the described mechanism for detecting filter clogging that possesses claim 1 to 10 stops up with the eyelet that carries out filter and detects.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007217415 | 2007-08-23 | ||
| JP2007217415A JP5216280B2 (en) | 2007-08-23 | 2007-08-23 | Filter clogging detection mechanism and projection display apparatus using the same |
| JP2007-217415 | 2007-08-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101371961A CN101371961A (en) | 2009-02-25 |
| CN101371961B true CN101371961B (en) | 2011-11-16 |
Family
ID=40381805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810146326XA Expired - Fee Related CN101371961B (en) | 2007-08-23 | 2008-08-25 | Mechanism for detecting filter clogging, video display apparatus and electronic device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7997736B2 (en) |
| JP (1) | JP5216280B2 (en) |
| CN (1) | CN101371961B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5380207B2 (en) * | 2009-08-27 | 2014-01-08 | 日立コンシューマエレクトロニクス株式会社 | Projection display |
| US8508919B2 (en) * | 2009-09-14 | 2013-08-13 | Microsoft Corporation | Separation of electrical and optical components |
| JP5589441B2 (en) * | 2010-02-26 | 2014-09-17 | ソニー株式会社 | Filter device and projector device |
| JP5402875B2 (en) * | 2010-08-20 | 2014-01-29 | コベルコ建機株式会社 | Construction equipment filter clogging detection device |
| US8932380B2 (en) | 2010-10-06 | 2015-01-13 | Nec Display Solutions, Ltd. | Dust removal device |
| US20140190240A1 (en) * | 2011-08-04 | 2014-07-10 | Telefonaktiebolaget L M Ericsson (Publ) | Method and device for detecting clogging of a filter |
| JP5915113B2 (en) | 2011-11-22 | 2016-05-11 | 株式会社リコー | Projector device |
| JP2014098523A (en) * | 2012-11-15 | 2014-05-29 | Fujitsu Ltd | Cooling system and air filter clogging detection method |
| JP6502167B2 (en) * | 2015-05-13 | 2019-04-17 | アクア株式会社 | Clothing processing equipment |
| JP6227610B2 (en) * | 2015-10-02 | 2017-11-08 | ファナック株式会社 | Cooling device having a function of detecting clogging of radiating fins |
| CN105467731B (en) * | 2015-12-16 | 2017-08-01 | 深圳市帅映科技股份有限公司 | A kind of heat management system of laser projection |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811624A (en) * | 2005-01-24 | 2006-08-02 | 乐金电子（沈阳）有限公司 | Dust cleaning device and method for filter of image display device |
| JP2006198504A (en) * | 2005-01-20 | 2006-08-03 | Nec Engineering Ltd | Clogging detecting device of air filter |
| JP2006267151A (en) * | 2005-03-22 | 2006-10-05 | Sanyo Electric Co Ltd | Projection type display apparatus |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3376540B2 (en) * | 1997-09-01 | 2003-02-10 | 株式会社日立製作所 | LCD projector |
| JP2000153121A (en) * | 1998-11-17 | 2000-06-06 | Sony Corp | Filter clogging judge and its control circuit |
| JP2000325720A (en) * | 1999-05-21 | 2000-11-28 | Sanyo Electric Co Ltd | Air cleaner |
| CN1518682A (en) * | 2001-06-21 | 2004-08-04 | ������������ʽ���� | Projector device |
| JP2003083587A (en) * | 2001-09-07 | 2003-03-19 | Sanyo Electric Co Ltd | Air conditioner |
| JP2004063993A (en) * | 2002-07-31 | 2004-02-26 | Seiko Epson Corp | Method of warning filter replacement and electronic equipment equipped with filter replacement warning mechanism |
| JP3717885B2 (en) * | 2002-12-12 | 2005-11-16 | 三洋電機株式会社 | Projection display device |
| JP4193654B2 (en) * | 2003-09-24 | 2008-12-10 | ソニー株式会社 | Projection display |
| JP2006091612A (en) * | 2004-09-27 | 2006-04-06 | Sanyo Electric Co Ltd | Projection type video display device |
| JP4243269B2 (en) * | 2005-09-09 | 2009-03-25 | 三洋電機株式会社 | Projector device |
| JP4997977B2 (en) * | 2006-02-24 | 2012-08-15 | セイコーエプソン株式会社 | projector |
| JP2007047843A (en) * | 2006-11-27 | 2007-02-22 | Sanyo Electric Co Ltd | Projection video display device |
| JP5205235B2 (en) * | 2008-12-04 | 2013-06-05 | 三洋電機株式会社 | Projection display device |
-
2007
- 2007-08-23 JP JP2007217415A patent/JP5216280B2/en active Active
-
2008
- 2008-08-20 US US12/195,004 patent/US7997736B2/en not_active Expired - Fee Related
- 2008-08-25 CN CN200810146326XA patent/CN101371961B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006198504A (en) * | 2005-01-20 | 2006-08-03 | Nec Engineering Ltd | Clogging detecting device of air filter |
| CN1811624A (en) * | 2005-01-24 | 2006-08-02 | 乐金电子（沈阳）有限公司 | Dust cleaning device and method for filter of image display device |
| JP2006267151A (en) * | 2005-03-22 | 2006-10-05 | Sanyo Electric Co Ltd | Projection type display apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| US20090051882A1 (en) | 2009-02-26 |
| JP2009050755A (en) | 2009-03-12 |
| CN101371961A (en) | 2009-02-25 |
| JP5216280B2 (en) | 2013-06-19 |
| US7997736B2 (en) | 2011-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101371961B (en) | Mechanism for detecting filter clogging, video display apparatus and electronic device | |
| EP1864490B1 (en) | Cooling system for a thin projector | |
| US9118847B2 (en) | Dustproof structure of image generation device, and projection display device | |
| JP4175383B2 (en) | Electronics | |
| US8562144B2 (en) | Image projection device and method for controlling air-filter | |
| US20070152552A1 (en) | Filtering device and projector utilizing the same | |
| JP2007101897A (en) | Projector | |
| CN114992717B (en) | Air conditioning equipment | |
| US8403498B2 (en) | Projector, and its filter renewal control method | |
| CN101369093B (en) | Image projection apparatus | |
| KR20190078278A (en) | Air conditioner and control method thereof | |
| JP2009098481A (en) | Method of controlling projector, and projector | |
| US20110141440A1 (en) | Projection type display device | |
| CN101685244A (en) | Projection type image display device | |
| CN100553735C (en) | Electronic installation | |
| JP2011227312A (en) | Electrical device and projection type display device | |
| JP2009075304A (en) | Projector | |
| JP5064123B2 (en) | Filter device and projection-type image display device using the same | |
| JP4151521B2 (en) | projector | |
| JP5134865B2 (en) | Cooling air volume detection device and projection type image display device using the same | |
| JP2010286699A (en) | Projector and electronic equipment | |
| US20030024683A1 (en) | Display device | |
| WO2018079024A1 (en) | Image projection unit and filter box | |
| JP2014174499A (en) | Projection type display device | |
| JP2013127572A (en) | Projection type video display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |